IS200ERSCG2A is an Exciter Regulator Static Converter Board part of the GE Excitation EX2100 series used in the excitation control systems. For the administration of industrial steam, hydro, or gas turbine systems, this control system is typically used in conjunction with GE's Mark VI turbine control system. It can also communicate with a user's standalone DCS (distributed control system) using Ethernet Modbus or a serial connection. The IS200ERSCG2A is a pulse-width-modulated dc output current generator for the EX2100 system. It also has a field discharge function that may be controlled by a regulator. These two functionalities are carried out via integrated IGBTs on the board's surface.
The board also has a relay that allows the dc-link charging resistor to be bypassed. When utilized in simplex or redundant applications, the IS200ERSCG2A board will connect with other boards. ERIO, ERDD, ERRR, ERRB, and ERBP boards may be used, depending on the arrangement.